Principles of Filtration: How do Filters Filter Anyway?by Larry Henke
Pages: 38 - 44
Filtration has long been an important technique in water treatment. It’s used to remove iron deposits from water, to clear up waters turbid from silt, inorganic sediments and biological materials, both living and decomposing.

Features

Softener Efficiency — It's Not Just about the Salt!by C.F. ‘Chubb’ Michaud, CWS-VI
Pages: 46 - 50
Water softener efficiency is a term generally used to rate a water softener by the relationship to its recovered capacity per pound of salt (NaCl) used in regeneration.

Self-regenerating Water Softener Rebates and Bans Updateby H. Martin Jessen and Michael T. Mecca
Pages: 52 - 56
Several communities are still actively taking action to regulate self-regenerating water softeners (SRWS) to reduce salinity levels in wastewater, which in turn, is causing high water treatment costs or discharge issues.

Columns

Dealer Dynamics: Responsible Water Stewardshipby Greg Reyneke, CWS-VI
Pages: 16 - 18
Potable water is arguably a nation’s most valuable strategic resource. Every drop of water that we use has a value of time, energy and human capital attached to it.

Viewpoint: February 2015by David Westman
Pages: 10
Dear Readers, It’s my distinct pleasure to continue a long-standing tradition in the partnership between the Water Quality Association and Water Conditioning & Purification International by writing the February edition of Viewpoint.